Daikin FVXG25K2V1B - Service Manual

Daikin FVXG25K2V1B

243 pages

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Service

Manual

[Applied Models]

O Inverter Pair : Heat Pump

Inverter Pair

Floor Standing Type K-Series

SiBE061121

Table of Contents

Table of Contents3
Introduction7
- Safety Cautions7
- Used Icons11
Part 1 List of Functions12
Functions13
Part 2 Specifications14
Specifications15
Part 3 Printed Circuit Board Connector Wiring Diagram17
Indoor Unit18
Outdoor Unit21
- Rxg25/35K2V1B21
- Rxg50K2V1B23
Part 4 Function and Control25
Main Functions26
- Temperature Control26
- Frequency Principle26
- Airflow Direction Control28
- Fan Speed Control for Indoor Unit29
- RADIANT Operation30
- Indoor Unit Fan Control31
- Program Dry Operation32
- Automatic Operation33
- Thermostat Control34
- NIGHT SET Mode35
- ECONO Operation36
- Inverter POWERFUL Operation37
- Other Functions38
Function of Thermistor40
Control Specification41
- Mode Hierarchy41
- Frequency Control42
- Controls at Mode Changing / Start-Up44
- Discharge Pipe Temperature Control46
- Input Current Control47
- Freeze-Up Protection Control48
- Heating Peak-Cut Control48
- Outdoor Fan Control49
- Liquid Compression Protection Function49
- Defrost Control50
- Outdoor Electronic Expansion Valve Control51
- Malfunctions54
Part 5 Operation Manual55
System Configuration56
Operation Manual57
- Names of Parts57
- Preparation before Operation61
- AUTO · DRY · COOL · HEAT · FAN Operation63
- RADIANT Operation64
- Temperature Setting65
- Adjusting the Airflow Direction and Rate66
- POWERFUL Operation68
- OUTDOOR UNIT QUIET Operation69
- ECONO Operation70
- OFF TIMER Operation71
- ON TIMER Operation72
- WEEKLY TIMER Operation73
- Quick Reference79
Part 6 Service Diagnosis80
Troubleshooting with LED82
- Indoor Unit82
- Outdoor Unit82
Problem Symptoms and Measures83
Service Check Function84
Troubleshooting87
- Error Codes and Description87
- Indoor Unit PCB Abnormality88
- Freeze-Up Protection Control or Heating Peak-Cut Control90
- Fan Motor (DC Motor) or Related Abnormality92
- Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-Up Protection Control94
- Thermistor or Related Abnormality (Indoor Unit)96
- Signal Transmission Error (between Indoor Unit and Outdoor Unit)97
- Unspecified Voltage (between Indoor Unit and Outdoor Unit)99
- Outdoor Unit PCB Abnormality100
- OL Activation (Compressor Overload)102
- Compressor Lock103
- DC Fan Lock104
- Input Overcurrent Detection105
- Four Way Valve Abnormality106
- Discharge Pipe Temperature Control108
- High Pressure Control in Cooling109
- Compressor System Sensor Abnormality110
- Position Sensor Abnormality112
- DC Voltage / Current Sensor Abnormality (25/35 Class)115
- CT or Related Abnormality (50 Class)116
- Thermistor or Related Abnormality (Outdoor Unit)118
- Electrical Box Temperature Rise120
- Radiation Fin Temperature Rise122
- Output Overcurrent Detection124
- Refrigerant Shortage126
- Low-Voltage Detection or Over-Voltage Detection129
- Signal Transmission Error on Outdoor Unit PCB (50 Class Only)131
Check132
- Thermistor Resistance Check132
- Fan Motor Connector Check133
- Power Supply Waveforms Check133
- Electronic Expansion Valve Coil Check134
- Four Way Valve Performance Check135
- Inverter Unit Refrigerant System Check135
- Inverter Checker" Check136
- Rotation Pulse Check on the Outdoor Unit PCB138
- Installation Condition Check139
- Discharge Pressure Check139
- Outdoor Fan System Check140
- Main Circuit Short Check140
- Capacitor Voltage Check141
- Power Module Check141
Part 7 Removal Procedure142
Indoor Unit143
- Removal of Front Panel143
- Removal of Air Filters144
- Removal of Front Grille ASSY145
- Removal of Electrical Box / Pcbs146
- Removal of Horizontal Blade159
- Removal of Swing Motor160
- Removal of Radiant Panel161
- Removal of Air Outlet ASSY166
- Removal of Drain Pan / Indoor Heat Exchanger ASSY168
- Removal of Fan Rotor / Fan Motor173
Outdoor Unit - RXG25/35K2V1B178
- Removal of Outer Panels / Fan Motor178
- Removal of Electrical Box187
- Removal of Pcbs190
- Removal of Reactor / Partition Plate198
- Removal of Sound Blankets200
- Removal of Four Way Valve202
- Removal of Compressor205
Outdoor Unit - RXG50K2V1B207
- Removal of Outer Panels207
- Removal of Outdoor Fan / Fan Motor211
- Removal of Electrical Box215
- Removal of Pcbs220
- Removal of Sound Blankets / Thermistors223
- Removal of Four Way Valve225
- Removal of Outdoor Electronic Expansion Valve226
- Removal of Compressor227
Part 8 Trial Operation and Field Settings230
Pump down Operation231
Forced Cooling Operation232
Trial Operation234
Field Settings235
- When 2 Units Are Installed in 1 Room235
- Standby Electricity Saving236
- Jumper and Switch Settings236
Application of Silicon Grease to a Power Transistor and a Diode Bridge237
Part 9 Appendix238
Piping Diagrams239
- Indoor Unit239
- Outdoor Unit240
Wiring Diagrams241
- Indoor Unit241
- Outdoor Unit242

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